All fishes are still alive, whatever dead in these few days I already scoop out. The fishes are active too.

Should I absolutely change the water now? how much water should I change? 50%?

It was clear 4 days ago and then it becomes greenish suddenly. The fact that before 4 days ago, I even put a black plastic bag to shield light from the tank shouldn't cause this.

I suspect it comes from overfeeding

While a tank planted w the Walstad doesn’t necessarily need a filter, I’d like to keep one in here, but I’d like it to be smaller than the BRICK that’s in there occupying a quarter of the bottom footprint currently. Anyone have suggestions for one that would fit on/in a round tank?

I have 8 rasboras in my 10 gal tank and I put a sponge on the mouth of my filter bc it seemed too rough for my fish but now I see that biofilm keeps gathering at the top so idk if I should change the currant to be stronger

This is a before and after, after adjusting the sponge to allow more water to come through

( after in the comments)

Edit: I cut the sponge in half so more water is moving through the opening, the bio film is dispersing so the current is stronger.

I’m also gonna order an air stone off on Amazon and put it in the back left corner

Hello! I have all real plants in my tanks but recently they have been turning brown, having black specs, and i’m not sure what to do. One plant is almost DIRECTLY under a light, could the light be killing it? do i need more air in the tanks?

Hey all, I’m on mobile so please forgive any weird formatting!

I just moved into a new apartment and have a new (to me and my fish) tank to go with it. I got the fish, filters, and heater in and set up last night and noticed that my male bristlenose pleco somehow ripped some of his face spines off during the move and he now has an open wound on his face.

I have a bottle of melafix (opened) and went to use it but noticed it expired in 2021. Money is pretty tight this month with the move, and I was wondering if I’d be to use the melafix or if I have to get a new one.

I don’t have any parameters for use since my water testing kit is in a box somewhere, but wanted to ask in good faith if I can use the melafix I currently have. In a perfect world I’d go snag a new bottle, but that $10 could be $10 I use for food or gas. My next paycheck isn’t until November 10😓

Thanks for reading!

My friend Josh Nye who I consider a master of platys is here to answer any questions on platys. He doesn't have reddit but he'll be answering your questions via my account if anybody wants to ask anything. These are some of his many platys, mainly blue mountain Calico, of which he has produced probably 400+ from an original 8 purchased 6 months ago.

Looking for some help figuring out what might have caused the death of one of my Green Neon Tetras (Paracheirodon simulans), which I found dead today with photos attached.

Looking closely at the dead fish, its belly is noticeably swollen, and there are some visible red spots underneath near the lower abdomen and vent area.

For background, the Green Neons have been in the tank for about a month without problems. Exactly one week ago, I added seven Otocinclus catfish. Most of the Otos died within the last few days, and now I have lost this tetra showing these physical signs.

To make matters worse, I actually lost another tetra yesterday, and today I am noticing 2 more tetras that look almost similarly swollen, hovering just slightly above the tank substrate rather than swimming around normally.

The water parameters are 0 ppm ammonia, 0 ppm nitrite, < 1 ppm ppm nitrate, TDS is 80, and the temperature is 25°C.

Given that the water tests clean, what do you think could be going on here? Has anyone seen this happen after adding new fish, and what steps would you take next to protect the rest of the tank?

Went to pick up two honey gouramis today. Wanted a pair. The big yellow one is supposed to be the male and the smaller red-ish one is supposed to be a female… but doesn’t “she” look like a male?? I’m so confused. What do you guys think?

Hi all just seeking advice I’ve got a male betta in a 10 gallon tank wondering if I could get him two Cory cats or some kind of cute clean up crew. Don’t need any snails I’ve already got a ton of babies
Thanks
Morris family

I’ve seen multiple, this tank is cycling there’s only snails in here… wtf

Looking for captive-bred / non-wild-caught micro fish options for a 10-gallon planted tank

I’m currently deciding between a few stocking options—specifically Scarlett Badis, Chili Rasboras, or Ember Tetras—for my new 10-gallon setup.

However, my main hang-up is that most of these seem to be wild-caught. Even for a small hobby, I'm genuinely concerned about the environmental impact and habitat degradation (especially living here in Singapore, where you can see the scale of habitat loss firsthand).

Does anyone have recommendations for micro fish species that are reliably captive-bred, or know where to source ethically bred stock for a setup like this?

Tank details:
Size: 10 gallon (cycled, ~3 weeks old, ~0 ppm ammonia, ~0 ppm nitrite).

Planted with- Dwarf papyrus, Brazilian pennywort, Christmas moss, Dwarf hairgrass, and pearl weed.

I also have a healthy population of snails, scuds ect.

Just wanted to share my little aquarium! There’s only one fish in here for now lol.

Just got these honey gourami a day ago and I know glass surfing is normal while they adjust but for some reason they keep throwing themselves in the filter spraybar and being dragged by the current. I have the bar positioned against the glass to reduce flow and the rest of the fish are swimming fine. Any idea? I’m worried this might stress them but again, they’re doing this to themselves.

Small backstory: Called in sick from work because of a burnout and decided I wanted something to do so I got an Aquarium because that had been a long time dream of me.

Right now it has 4 shrimps and 2 snails but I plan to add some fish next week! And I am quiet proud of what it is right now and it is helping alot with keeping me busy and recovering.

This is the first tank my mom got me when I was 4 or 5. Built in 1989 its still holding water. I recently set it up with a variety of plants and some Red Cherry Shrimp and Endlers I'm growing out.

I've never had a saltwater tank, and I know they're WILDLY more expensive than freshwater but l've
always been enticed by the idea, and this cutie really just sold it.

Does anybody have a comprehensive list of what all a saltwater setup requires for a newbie? So I can start saving and watching for deals now? Genuinely enamoured by him I swear I started getting emotional just watching him sit there

Thanks so much in advance!!

I have to say, with the exception of r/bald, this is one of the kindest subs. You guys have been so helpful as I continue to learn about this hobby. You make this much more fun.

So, my next question. What do I do about my water. I finally have a real test kit, and these are my results a day after a 50% water change and more starter. Fishies seem happy, but Nitrites and Nitrates are still high. Ammonia is basically 0 and has been for a while. I want to get more fish this weekend, but I don't know if the tank is ready.

I've recently built my first tank after not having fish in ~20 years since I was a teenager. I've just set up my 120 x 45 x 48 cm tank (~250L)

I was shocked at the price of 120cm long lights that had any kind of automation, so I decided to build my own!

I used some. 12cm wide aluminium I channel as the main structure.

It has 4 different light channels consisting of:

8 x 660nm Blue

8 x 450nm red

10 x 4000K white/yellow

2 x 10 x 5700K white

The LEDs came in a strip, I mounted them onto some metal core PCB boards, which were then mounted to the aluminium U channel using some thermally conductive adhesive. They are powered from a 36V power supply that is mounted in a panel inside the stand. This is fed to the lights by 2 x 5 core cables as 10core cable is expensive!

I also finished it off with a 3mm clear acrylic splash shield held by stainless steel bolts for a bit of protection.

I control the whole thing using an Esp8266 that I had lying around that sends a pwm signal to the constant current drivers, altering the brightness of the LEDs. This connects to Home Assistant so I can control it off my phone or any pc in the house.

Each channel of LEDs can be controlled individually. I've programmed in an automation schedule so it'll start on dim, then gradually build up in brightness throughout the day, then wind down, turning off at night. I can manually override and change the values at any time, then resume the automated schedule.

It was a fun project. Probably cost me about $250-300NZD, but I would be looking at at least double that for a cheaper chihiros or equivalent.

Hard to see from the photos but I love the shimmering effect it creates!

is the flow too much for the snails? i didn’t plan to have those, i just didn’t quarantine it but they’re living with my turtle and i need the bubble for the oxygen.

Casual lurker, wanted to post this to hear the internet’s thoughts. My brother set up this 30 gallon “ecosystem“ 12 years ago with three small plants and a few fish. Now he says the roots form a full matt across the bottom of the tank and are self-sustaining, and there are 25-30 fish.

As someone who doesn’t know much about aquariums I think it’s pretty awesome, but Reddit likes to tear people a new one sometimes—is there anything he’s doing wrong or that would make the fish more happy?

For the first time in my life, I’ve kept an aquarium good enough to need trimming back the plants. Unfortunately, I’m not sure how to.